Huben GK1: What Silencer for Backyard Quiet? (or almost)

Wow!! First time shooting with my Donny FL Tanto and it works well. No hearing protection needed. It slightly obscures the front iron sight, but not enough for me as a shooter to adjust. My first group looked tighter. I’m going to keep shooting to see if that’s a consistent trend.

Some of the 3D printed moderators look a lot more streamlined to the GK1’s design. Y’all have some good looking moderators.

Using a 3d printed moderator. I used Bambu PA-CF filament for the first time and I am super pleased with the results. Perfect thread profile, no stringing, good surface finish, 10g lighter than print in PETG with same settings. Since the moderator I'm using is not cylindrical it needs to be "clocked" using some sort of spacer in order to line up with the gun when tightened up. I bought some 1/2" barrel shims for $10 delivered. Very handy, easy to justify buying... I have enough shims to do multiple guns.

denovich said:

Using a 3d printed moderator. I used Bambu PA-CF filament for the first time and I am super pleased with the results. Perfect thread profile, no stringing, good surface finish, 10g lighter than print in PETG with same settings. Since the moderator I'm using is not cylindrical it needs to be "clocked" using some sort of spacer in order to line up with the gun when tightened up. I bought some 1/2" barrel shims for $10 delivered. Very handy, easy to justify buying... I have enough shims to do multiple guns.


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Good to know that those things exist

I didn't know about these washer shims, and made my own, by making and grinding a washer by hand to fit. Tedious, to say the least, and hard to keep them flat. It's astounding that 5 degrees of error is only about 0.0007" for a 20 TPI thread. [ 1/20 * 5/360 = 0.0006944" ] By the third washer, I got pretty good at making them and quite a bit faster. Good to know about these pre-made washers!

denovich said:

Using a 3d printed moderator. I used Bambu PA-CF filament for the first time and I am super pleased with the results. Perfect thread profile, no stringing, good surface finish, 10g lighter than print in PETG with same settings. Since the moderator I'm using is not cylindrical it needs to be "clocked" using some sort of spacer in order to line up with the gun when tightened up. I bought some 1/2" barrel shims for $10 delivered. Very handy, easy to justify buying... I have enough shims to do multiple guns.


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Seems to me that if you print the moderator then shims ought to be a piece of cake.

Sawney Bean said:

Seems to me that if you print the moderator then shims ought to be a piece of cake.

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Printing is tough to keep the necessary tolerances required to avoid a shim. Its possible, if you have the original CAD file to make a minute change in dimension, or even to slightly rotate the start of the female thread. I'd think rotating the helix might be easier than adjusting the thickness to the precision required.

Simple FDM printers are ok, but they are not terrific at holding dimensions, at least not to 0.0001". Part of it is the precision of the printer, and the other part is the precision of the slicer. I've printed U-channel sections to hold a DRO read head, and the slicer really has issues with getting the inside dimension correctly, it's not one of the things that is optimized. Likewise overall length. It's close, but not micrometer close. Simply a limitation of the technology, and how well one's machine is calibrated.

Basically, it's not very easy to print a precision shim to the tolerance required, which demands 0.00014" (1 degree) accuracy. You can fudge it a little, but not by much.

denovich said:

Using a 3d printed moderator. I used Bambu PA-CF filament for the first time and I am super pleased with the results. Perfect thread profile, no stringing, good surface finish, 10g lighter than print in PETG with same settings. Since the moderator I'm using is not cylindrical it needs to be "clocked" using some sort of spacer in order to line up with the gun when tightened up. I bought some 1/2" barrel shims for $10 delivered. Very handy, easy to justify buying... I have enough shims to do multiple guns.


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Have you shot the GK1 at higher power levels using this printed moderator? Such as 35fpe and up. Or does it mainly serve its purpose around the low power levels?

JaceSpace1369 said:

Have you shot the GK1 at higher power levels using this printed moderator? Such as 35fpe and up. Or does it mainly serve its purpose around the low power levels?

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I shoot my GK1 in two modes. Minimum power and about 40fpe. Mod works for both... pellet/slug impact is the loudest thing in either case.

denovich said:

I shoot my GK1 in two modes. Minimum power and about 40fpe. Mod works for both... pellet/slug impact is the loudest thing in either case.

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Sick!

I'm using the same mod in PETG at 35-38FPE. So far so good.

JungleShooter said:

GK1: What Silencer for Backyard Quiet?​

Based on your personal experience:
What silencer would I need to get the GK1 down to "backyard quiet" or almost so?

Specs:
.22cal
15FPE (650fps with a 16gr)


I understand that bigger and longer gets the gun quieter, but I'd like to stick with the minium length necessary....


Thanks for your input.

Matthias

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In order of quiet:

Hugget was best
Then Weihrauch
Then zero DB
Then impulse Air
And the loudest was my new Brocock moderator - WTH?

FLgunner said:

I use a 3D printed one on my .25 GK1, it does a really good job making it backyard friendly and is only 3" long. The diameter is 25mm, so the iron sights can be used.


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I thought you used a 1350 with the orange baffle? I bought the exact same one and it works very well. Where did you get this suppressor? Thanks in advance.

scopecreep... said:

Matthias,

I finally tried out the Huben moderator this afternoon. My 0.22 is tuned for 20 foot pounds with 15.89 Hades. It's plenty quite for backyard use. Kelly is correct, unlike any other supplemental moderator I have used there is no charge in point of impact.

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what does this mean? there is no charge in point of impact